The electrical appliances in a house are usually connected in:

The correct option is B parallel
A parallel electric connection supplies the same voltage to all the appliances connected, while a series connection supplies the same electric current. In a parallel connection, even if one of the appliances is damaged or fused, the rest of them would not be affected and hence, they work normally. Whereas in a series connection, damage in an appliance stops the other appliances from functioning. Due to this, household electrical connections are always parallel.